EP2019639A1 - Sperrvorrichtung und verfahren für ein knochenstabilisierungssystem mit einem stellschraubenelement und verformbarem sattelelement - Google Patents

Sperrvorrichtung und verfahren für ein knochenstabilisierungssystem mit einem stellschraubenelement und verformbarem sattelelement

Info

Publication number
EP2019639A1
EP2019639A1 EP07761341A EP07761341A EP2019639A1 EP 2019639 A1 EP2019639 A1 EP 2019639A1 EP 07761341 A EP07761341 A EP 07761341A EP 07761341 A EP07761341 A EP 07761341A EP 2019639 A1 EP2019639 A1 EP 2019639A1
Authority
EP
European Patent Office
Prior art keywords
stabilization
coupling mechanism
locking device
set screw
bone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07761341A
Other languages
English (en)
French (fr)
Inventor
Jeffrey D. Moore
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Warsaw Orthopedic Inc
Original Assignee
Warsaw Orthopedic Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Warsaw Orthopedic Inc filed Critical Warsaw Orthopedic Inc
Publication of EP2019639A1 publication Critical patent/EP2019639A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7011—Longitudinal element being non-straight, e.g. curved, angled or branched
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A61B2090/037—Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced diameter

Definitions

  • the present invention relates generally to orthopaedic implants used for the correction of spinal injuries or deformities, and more specifically, but not exclusively, concerns apparatuses for fixing a particular segment or level of the spine, to allow for deformity correction or healing thereof.
  • Typical spinal implant or bone stabilization systems utilize a rod as the support and stabilizing element.
  • a series of two or more bone fasteners are inserted into two or more vertebrae to be instrumented.
  • a rod or other stabilizing device is then placed within or attached to the heads of the bone fasteners, or is placed within a coupling device that links the rod and the head of the bone fastener.
  • the connections between these multiple components are then secured, thereby fixing a supporting construct to multiple levels in the spinal column.
  • the bone stabilization system includes a bone anchor, a coupling mechanism and a stabilization member, wherein the coupling mechanism is configured to couple the stabilization member to the bone anchor, the locking device includes a set screw member and a saddle member.
  • the set screw member may be configured to operatively engage with the coupling mechanism to secure the stabilization member within the coupling mechanism.
  • the saddle member is fabricated from a deformable material and is attached to the set screw member.
  • the saddle member includes a distal interface surface and a proximal interface surface, with the distal interface surface being shaped to partially surround the stabilization member when the stabilization member is placed within the coupling mechanism.
  • the proximal interface surface of the saddle member is configured to couple to the set screw member.
  • the present invention provides, in another aspect, a bone stabilization system which includes a bone anchor, a stabilization member, a coupling mechanism and a locking device.
  • the coupling mechanism is configured to operatively connect the bone anchor and the stabilization member.
  • the locking device includes a set screw member configured to thread into the coupling mechanism and a saddle member.
  • the saddle member is attached to the set screw member and is fabricated from a deformable material.
  • An enhanced aspect of the locking device for use in a bone stabilization system employing a set screw member and a deformable saddle member is the saddle member to be fabricated from the same material as the stabilization member.
  • the material used to make the saddle member and the stabilization member is a type of plastic.
  • the plastics used for fabricating the saddle member and the stabilization member are deformable and possess a flexural modulus that are either the same or substantially similar to each other.
  • the plastics preferably used for manufacturing the saddle member and the stabilization member is a polyetheretherketone.
  • a potential drawback to the use of polyetheretherketone is the material's susceptibility to breakage due to its inherent notch sensitivity.
  • the present invention provides, in another aspect, a method for stabilizing a spinal column by the use of a bone stabilization system.
  • the bone stabilization system includes a bone anchor, a stabilization member, a coupling mechanism and a locking device with the coupling mechanism configured to couple the stabilization member to the bone anchor and the locking device being operatively associated to the coupling mechanism.
  • the locking device includes a set screw member configured to engage the coupling mechanism and a saddle member coupled to the set screw member, wherein the saddle member is made from a deformable material.
  • the method further includes positioning the stabilization member within the coupling mechanism and engaging the locking device to the coupling mechanism by threading the set screw member into the coupling mechanism. The set screw member is advanced into the coupling mechanism causing the saddle member to partially compress against the stabilization member and frictionally hold the stabilization member within the coupling mechanism.
  • FIG. 1 is a perspective view of one embodiment of a bone stabilization system, in accordance with an aspect of the present invention
  • FIG. 2 is a perspective view of one embodiment of a coupling mechanism, in accordance with an aspect of the present invention.
  • FIG. 3 is a cross-section elevational view of the coupling mechanism of FIG. 2 taken along line 3-3, in accordance with an aspect of the present invention
  • FIG. 4 is a perspective view of one embodiment of a locking device threadably engaged within the coupling mechanism of FIGS. 2 & 3, in accordance with an aspect of the present invention
  • FIG. 5 is a side elevational view of the locking device and the coupling mechanism embodiment of FIG. 4, in accordance with an aspect of the present invention
  • FIG. 6 is a side elevational view of the locking device embodiment of FIGS. 4 & 5, in accordance with an aspect of the present invention
  • FIG. 7 is a distal perspective view of the locking device embodiment of FIGS. 4-6, in accordance with an aspect of the present invention
  • FIG. 8 is a distal perspective view of one embodiment of a set screw member, in accordance with an aspect of the present invention.
  • FIG. 9 is a distal perspective view of one embodiment of a saddle member, in accordance with an aspect of the present invention.
  • FIG. 10 is a side elevational view of the saddle member of FIG. 9, in accordance with an aspect of the present invention.
  • FIG. 11 is a side elevational view of one embodiment of a bone anchor, in accordance with an aspect of the present invention.
  • FIG. 12 is a cross-section elevational view of the locking device of FIG. 6 taken along line 12-12, in accordance with an aspect of the present invention.
  • a bone stabilization system 60 in accordance with an aspect of the present invention, includes a coupling mechanism 10, a locking device, comprising a set screw member 20 and a saddle member 50, a stabilization member 30, and a bone anchor 40.
  • a bone anchor 40 When used in the spine to secure multiple levels of the spinal column, a bone anchor 40 is placed within an individual vertebrae and a coupling mechanism 10 is then attached to each implanted bone fastener 40.
  • an appropriately dimensioned stabilization member 30, which spans the levels of the affected vertebral region, is placed within the coupling mechanisms 10 and secured in place employing multiple locking devices.
  • the locking device includes set screw member 20 and saddle member 50.
  • stabilization member 30 When the locking device is in use stabilization member 30 is frictionally held in place between coupling mechanism 10 and the locking device by saddle member 50.
  • bone stabilization system 60 includes coupling mechanism 10 with a channel 14 defined by a seat 13 and a pair of coupling arms 11.
  • Coupling arms 11 are disposed parallel and project in an upward manner from seat 13.
  • Coupling arms 11, together with seat 13 form U-shaped channel 14 which is appropriately sized to receive stabilization member 30.
  • the internal walls of coupling arms 11 include internal threads 12 or alternatively an internal cam surface (not shown) to engage external threads 21 of set screw member 20 (as shown in FIGS. 4-8).
  • at least one through hole 15 is located directly below seat 13 in coupling mechanism 10.
  • bone anchor 40 (see FIG. 1) is inserted into hole 15 prior to the placement of stabilization member 30.
  • the longitudinal axis of bone anchor 40 may be at a fixed angle relative to coupling mechanism 10 following insertion into hole 15 or be allowed to pivot within hole 15.
  • Hole 15 may be counter bored, counter sunk, slotted, have a spherical seat, keyed or any combination or derivation of these manufacturing techniques, to allow the top portion of the anchor head 41 (see FIG. 11) to sit below the seat floor 16.
  • coupling mechanism 10 is illustrated as including at least one set screw member 20 threadably engaged with internal threads 12, although it is understood to those skilled in the art that other configurations are contemplated, including a set screw configured to include an external cam surface (not shown) that engages with an internal cam surface (not shown) located on the internal surface of coupling arms 11.
  • the locking device 70 In an unlocked position, the locking device 70 (see FIGS. 6 & 7) initiates engagement with internal threads 12 and allows stabilization member 30 to move freely within channel 14.
  • the locking device 70 When in a locked position, preferably the locking device 70 (see FIGS. 6 & 7) is substantially engaged with internal threads 12, resulting in a pressing engagement or a compressive force being applied across the distal interface surface 51 of saddle member 50 onto stabilization member 30.
  • Stabilization member 30 is typically shaped as an elongate and continuous orthopaedic implant, preferably in the shape of a rod.
  • Alternative stabilization members may include, but are not limited to plates, bars, tethers, cables, elastic structures and dynamic stabilization members (not shown).
  • Stabilization member 30 may be fabricated from a plastic material, preferably polyetheretherketone (PEEK) polymer.
  • PEEK polyetheretherketone
  • stabilization member 30 may be fabricated from a material selected from the group consisting of carbon fiber composite polymers, bio-compatible metals, shape memory metals, resorbable polymers, bio-inert polymeric materials, thermoplastic polymers, thermoset polymers and any combinations of these materials.
  • locking device 70 is shown and preferably includes set screw member 20 with external threads 21 for engagement with coupling member 10, and saddle member 50.
  • saddle member 50 is connected to set screw member 20, adjacent to the distal end 25 of set screw member 20.
  • a tool recess 22 is located in the proximal end of set screw member 20 to facilitate the insertion of a tightening tool or instrument (not shown).
  • FIG. 8 depicts set screw member 20 prior to being coupled to saddle member 50.
  • a cylindrical locking nub 23 extends from distal end 25. Locking nub 23 is sized to allow for insertion into a hole located preferably in the central aspect of saddle member 50.
  • Set screw member 20 may be fabricated from a titanium alloy, preferably the alloy Ti-6A1-4V.
  • set screw member 20 may be fabricated from a material selected from the group consisting of CP titanium, cobalt-chromium, a 300 series stainless steel, carbon fiber materials, carbon fiber composites, resorbable polymers, bio-inert polymeric materials, thermoplastic polymers, thermoset polymers and any combination of these materials.
  • Saddle member 50 preferably includes a proximal interface surface 54 (see FIG. 10) that may contact distal end 25 following the securement of stabilization member 30 by the locking device 70 (see FIGS. 6 & 7) within coupling mechanism 10.
  • saddle member 50 may include a distal interface surface 51 that is preferably configure to partially surround stabilization member 50.
  • the shape and material of distal interface surface 51 allows saddle member 50 to elastically deform and frictionally secure stabilization member 30 when locking device 70 is threadingly advanced into coupling member 10.
  • the outer perimeter of distal interface surface 51 is rectangular shaped. As depicted in FIG.
  • the concave receiving channel is preferably located in the central aspect of distal interface surface 51 , running generally parallel to the long axis of the rectangular outer perimeter.
  • Saddle member 50 may include at least one hole 52 which preferably passes from the proximal interface surface 54 through to distal interface surface 51.
  • Hole 52 may be located in the center area of saddle member 50.
  • the centerline of hole 52 may be about normal to proximal interface surface 54.
  • the inner diameter of hole 52 is preferably configured and dimensioned to receive locking nub 23.
  • hole 52 preferably includes a counter bore 53, wherein the depth of counter bore 53 relative to distal interface surface 51 is variable depending on the construct material and may range between 0.5 mm to 1.0 mm. As depicted in FIG.
  • Saddle member 50 is fabricated from a deformable plastic material, preferably the polyetheretherketone (PEEK) polymer.
  • saddle member 50 may be fabricated from another deformable material selected from the group consisting of carbon fiber composite polymers, UHMWPE, shape memory metals, resorbable polymers, bio- inert polymeric materials, thermoplastic polymers, thermoset polymers and any combinations of these materials.
  • the material used to comprise saddle member 50 will have a flexural modulus that is equivalent or similar to the flexural modulus of stabilization member 30.
  • the preferred range of the flexural modulus of saddle member 50 is from about 30 to 115MPa.
  • bone anchor 40 is typically configured as a bone screw, although, alternative bone anchors may be utilized including, but not limited to bone fixation posts (not shown), bone staples (not shown), hooks (not shown), and moveable head screws (not shown). It is understood to those skilled in the art that the bone anchor- coupling mechanism structure described is for example only and that other configurations may be used, including coupling mechanism 10 configured to be integrally coupled to bone anchor 40.
  • the assembly process for connecting saddle member 50 to set screw member 20 typically includes the steps of placing set screw member 20 on a flat surface with distal end 25 being upright. Proximal interface surface 54 is placed onto distal end 25. Saddle member 50 must be aligned to allow for locking nub 23 to pass through hole 52 and protrude above the edge of counter bore 53. Preferably, the next step in the assembly process is for a deforming load to be applied to the end of locking nub 23, thereby generating flare 24 on the end of locking nub 23 as shown in FIG. 12. Flare 24 contacts the internal shoulder of counter bore 53 as seen in FIG. 12 and substantially prohibits any axial translational movement of saddle member 50 relative to set screw member 20. Flare 24 does allow rotational movement of saddle member 50 relative to set screw member 20.
  • the steps of the method for stabilizing a spinal column includes, first providing bone stabilization system 60 consisting of bone anchor 40, stabilization member 30, coupling member 10 and locking device 70.
  • Coupling device 10 may be constructed to couple stabilization member 30 to bone anchor 40.
  • the locking device 70 is configured to operatively associate with coupling mechanism 10.
  • the locking device 70 includes saddle member 50 connected to set screw member 20, with saddle member 50 being fabricated from a deformable material.
  • the next step of the method is to preferably position stabilization member 30 into channel 14 located within coupling mechanism 10.
  • the next step is to initiate engagement of locking device 70 to coupling mechanism 10.
  • the last step of the method of stabilizing a spinal column would be to threadingly advance set screw member 20 downward into coupling arms 11 and cause saddle member 50 to contact and partially compress stabilization member 30 within channel 14.
  • locking device 70 is sufficiently advanced to frictionally hold stabilization member 30 within coupling mechanism 10.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Neurology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
EP07761341A 2006-05-01 2007-04-26 Sperrvorrichtung und verfahren für ein knochenstabilisierungssystem mit einem stellschraubenelement und verformbarem sattelelement Withdrawn EP2019639A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/414,879 US20070270832A1 (en) 2006-05-01 2006-05-01 Locking device and method, for use in a bone stabilization system, employing a set screw member and deformable saddle member
PCT/US2007/067492 WO2007130840A1 (en) 2006-05-01 2007-04-26 Locking device and method, for use in a bone stabilization system, employing a set screw member and deformable saddle member

Publications (1)

Publication Number Publication Date
EP2019639A1 true EP2019639A1 (de) 2009-02-04

Family

ID=38457646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07761341A Withdrawn EP2019639A1 (de) 2006-05-01 2007-04-26 Sperrvorrichtung und verfahren für ein knochenstabilisierungssystem mit einem stellschraubenelement und verformbarem sattelelement

Country Status (7)

Country Link
US (1) US20070270832A1 (de)
EP (1) EP2019639A1 (de)
JP (1) JP2009535177A (de)
KR (1) KR20090018063A (de)
CN (1) CN101442947A (de)
AU (1) AU2007248219A1 (de)
WO (1) WO2007130840A1 (de)

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US8105367B2 (en) 2003-09-29 2012-01-31 Smith & Nephew, Inc. Bone plate and bone plate assemblies including polyaxial fasteners
US8888824B2 (en) 2005-07-25 2014-11-18 Smith & Nephew, Inc. Systems and methods for using polyaxial plates
US10080598B2 (en) 2005-07-25 2018-09-25 Smith & Nephew, Inc. Systems and methods for using polyaxial plates

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US8377100B2 (en) 2000-12-08 2013-02-19 Roger P. Jackson Closure for open-headed medical implant
US8353932B2 (en) 2005-09-30 2013-01-15 Jackson Roger P Polyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate member
US10258382B2 (en) 2007-01-18 2019-04-16 Roger P. Jackson Rod-cord dynamic connection assemblies with slidable bone anchor attachment members along the cord
US8292926B2 (en) 2005-09-30 2012-10-23 Jackson Roger P Dynamic stabilization connecting member with elastic core and outer sleeve
US7862587B2 (en) 2004-02-27 2011-01-04 Jackson Roger P Dynamic stabilization assemblies, tool set and method
US10729469B2 (en) 2006-01-09 2020-08-04 Roger P. Jackson Flexible spinal stabilization assembly with spacer having off-axis core member
US11224464B2 (en) 2002-05-09 2022-01-18 Roger P. Jackson Threaded closure with inwardly-facing tool engaging concave radiused structures and axial through-aperture
US8876868B2 (en) 2002-09-06 2014-11-04 Roger P. Jackson Helical guide and advancement flange with radially loaded lip
US7621918B2 (en) 2004-11-23 2009-11-24 Jackson Roger P Spinal fixation tool set and method
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US7377923B2 (en) 2003-05-22 2008-05-27 Alphatec Spine, Inc. Variable angle spinal screw assembly
US8377102B2 (en) 2003-06-18 2013-02-19 Roger P. Jackson Polyaxial bone anchor with spline capture connection and lower pressure insert
US8398682B2 (en) 2003-06-18 2013-03-19 Roger P. Jackson Polyaxial bone screw assembly
US8257398B2 (en) 2003-06-18 2012-09-04 Jackson Roger P Polyaxial bone screw with cam capture
US7776067B2 (en) 2005-05-27 2010-08-17 Jackson Roger P Polyaxial bone screw with shank articulation pressure insert and method
US7766915B2 (en) 2004-02-27 2010-08-03 Jackson Roger P Dynamic fixation assemblies with inner core and outer coil-like member
US8926670B2 (en) 2003-06-18 2015-01-06 Roger P. Jackson Polyaxial bone screw assembly
US7967850B2 (en) 2003-06-18 2011-06-28 Jackson Roger P Polyaxial bone anchor with helical capture connection, insert and dual locking assembly
US8137386B2 (en) 2003-08-28 2012-03-20 Jackson Roger P Polyaxial bone screw apparatus
US7179261B2 (en) 2003-12-16 2007-02-20 Depuy Spine, Inc. Percutaneous access devices and bone anchor assemblies
US11419642B2 (en) 2003-12-16 2022-08-23 Medos International Sarl Percutaneous access devices and bone anchor assemblies
US7527638B2 (en) 2003-12-16 2009-05-05 Depuy Spine, Inc. Methods and devices for minimally invasive spinal fixation element placement
US8152810B2 (en) 2004-11-23 2012-04-10 Jackson Roger P Spinal fixation tool set and method
US11241261B2 (en) 2005-09-30 2022-02-08 Roger P Jackson Apparatus and method for soft spinal stabilization using a tensionable cord and releasable end structure
CA2701522C (en) 2004-02-27 2012-05-15 Roger P. Jackson Orthopedic implant rod reduction tool set and method
US7160300B2 (en) 2004-02-27 2007-01-09 Jackson Roger P Orthopedic implant rod reduction tool set and method
US9050148B2 (en) 2004-02-27 2015-06-09 Roger P. Jackson Spinal fixation tool attachment structure
US7651502B2 (en) 2004-09-24 2010-01-26 Jackson Roger P Spinal fixation tool set and method for rod reduction and fastener insertion
US8926672B2 (en) 2004-11-10 2015-01-06 Roger P. Jackson Splay control closure for open bone anchor
JP2008519656A (ja) 2004-11-10 2008-06-12 ロジャー・ピー・ジャクソン 破断伸張部付の螺旋状案内及び前進フランジ
US8444681B2 (en) 2009-06-15 2013-05-21 Roger P. Jackson Polyaxial bone anchor with pop-on shank, friction fit retainer and winged insert
US7875065B2 (en) 2004-11-23 2011-01-25 Jackson Roger P Polyaxial bone screw with multi-part shank retainer and pressure insert
US9980753B2 (en) 2009-06-15 2018-05-29 Roger P Jackson pivotal anchor with snap-in-place insert having rotation blocking extensions
US9216041B2 (en) 2009-06-15 2015-12-22 Roger P. Jackson Spinal connecting members with tensioned cords and rigid sleeves for engaging compression inserts
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AU2007248219A1 (en) 2007-11-15
CN101442947A (zh) 2009-05-27
KR20090018063A (ko) 2009-02-19
WO2007130840A1 (en) 2007-11-15
US20070270832A1 (en) 2007-11-22

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